After several smart 451EDs turned into “bricks” after a low-voltage
battery failure went undetected for some period of time, I added a few
more diagnostic error messages about the status of the low-voltage (12
I also added a small bit of diagnostics around the balance across the
cells of the traction battery in the car.
As always, the updates are free and can be applied using free tools as
detailed in the Upgrading post.
There are no functionality changes in this version, so you can
perfectly well use a v1.0.7 to diagnose your low-voltage battery. All
this version does is do some plain-English interpretation of the
Also note that the voltages reported by the car’s on-board system via
the test unit are consistently low as compared to using an actual
meter. This means that you should confirm any low reading with a
multi-meter before concluding that a battery replacement is warranted.
These measurements should be considered imprecise but directionally